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High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO 3 hybrid nanofibers
Author(s) -
Xu Wenhui,
Ding Yichun,
Jiang Shaohua,
Ye Wan,
Liao Xiaojian,
Hou Haoqing
Publication year - 2016
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23236
Subject(s) - materials science , barium titanate , nanocomposite , composite material , dielectric , thermal stability , permittivity , polyimide , dielectric loss , capacitor , scanning electron microscope , ceramic , optoelectronics , chemical engineering , electrical engineering , layer (electronics) , voltage , engineering
High dielectric permittivity, good mechanical properties, and excellent thermal stability are highly desired for the dielectric materials used in the embedded capacitors and energy‐storage devices. This study reports polyimide (PI)/barium titanate (BaTiO 3 ) nanocomposites fabricated from electrospun PI/BaTiO 3 hybrid nanofibers. The PI/BaTiO 3 nanocomposites were investigated using Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, thermal gravimetric analysis, an electromechanical testing machine, a LCR meter and an electric breakdown strength tester. The results showed that BaTiO 3 fillers were uniformly dispersed up to 50 vol% in PI matrix. The dielectric permittivity of the composite (50 vol% BaTiO 3 ) was 29.66 with a dielectric loss of 0.009 at 1 kHz and room temperature. The dielectric permittivity showed a very small dependence on temperature (up to 150°C) and frequency (100 Hz–100 kHz). The nanocomposites also showed high thermal stability and good mechanical properties. The PI/BaTiO 3 nanocomposites will be a promising candidate for uses in embedded capacitors, especially in high temperature circumstance. POLYM. COMPOS., 37:794–801, 2016. © 2014 Society of Plastics Engineers